What does StackOptic analyze?

StackOptic runs 18 analysis modules on any public website from a single URL. It detects 7,000+ technologies (CMS, frameworks, analytics, payments, CDN, hosting), evaluates SSL certificates and HTTP security headers with grades from A+ to F, measures Core Web Vitals (LCP, CLS, TBT, FCP), audits SEO meta tags and structured data, checks email security (SPF, DKIM, DMARC), analyzes AI & LLM readiness including bot access and llms.txt validation, extracts color palettes and typography, estimates carbon footprint, and generates permanent shareable reports.

Does it work on sites behind Cloudflare or bot protection?

Yes. StackOptic uses a real browser engine that loads pages exactly like a human visitor — executing JavaScript, rendering CSS, and handling redirects. This allows it to bypass Cloudflare, LiteSpeed, Sucuri, and other bot protection systems where traditional crawlers and HTTP-only tools fail.

What do I get on the free plan?

The free plan includes 5 analyses per day with access to all 18 modules, full scores, technology detection, and security grades. Every report is permanently accessible via a unique shareable URL — no login required to view. No credit card needed. AI-powered insights, re-analysis, PDF/JSON export, and comparison features are available on Pro ($24/mo) and Agency ($99/mo) plans.

What is AI & LLM readiness analysis?

This module evaluates how visible and citable your website is to AI search engines like ChatGPT, Perplexity, Google AI Overviews, and Claude. It audits access permissions for 8 major AI bots, validates llms.txt and llms-full.txt files, scores citation-ready content structure, and analyzes structured data (JSON-LD) for GEO readiness — helping you rank in the next generation of search.

How long does an analysis take?

Most analyses complete in under 10 seconds. StackOptic runs all 18 modules in parallel using a real browser session, so you get technology detection, security audit, performance metrics, SEO analysis, and AI readiness scoring simultaneously.

How accurate are the results?

Detection is based on real browser execution — DOM inspection, JavaScript runtime analysis, HTTP headers, and DNS records. With 7,000+ technology signatures and Lighthouse-calibrated performance scoring, StackOptic achieves high accuracy for mainstream technologies.

What security checks are performed?

The security module evaluates SSL/TLS certificates, 12+ HTTP security headers (HSTS, CSP, X-Frame-Options, Permissions-Policy, Referrer-Policy), HTTPS enforcement, and email authentication (SPF, DKIM, DMARC). Each site receives a letter grade from A+ to F with specific remediation steps.

Do you store the websites I analyze?

StackOptic only stores publicly available information that any visitor to a website would see — HTML content, HTTP headers, DNS records, and screenshots. We do not access private data, log in to websites, or perform any intrusive testing.

Back to Search

paloaltoonline.com

https://paloaltoonline.com· First analyzed 25 Apr 2026· Updated 25 Apr 2026

Export

paloaltoonline.com

Mobile

Sponsored

Hosting Provider

Automattic, Inc

IP Address

192.0.78.181

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 San Francisco, United States

ASN

AS2635

Server

Nginx

CDN

Cloudflare

WAF

Cloudflare

Nameservers

garret.ns.cloudflare.com.tiffany.ns.cloudflare.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

603 ms10%

Speed Index

784 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

1.9 MB

167 requests

Image Optimization

Lazy LoadWebPResponsiveJetpack Photon (WordPress)

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPress

cms

Newspack Scottv2.21.0Custom

by Automattic

View Theme

Technology Stack

33 Technologies Detected

Libraries

Analytics

Other

CSS Frameworks

Fonts

Tag Managers

Advertising

Web Servers

Customer Support

Security

SEO Analysis

A88/100

Meta Tags8/15

Content10/12

Headings8/8

Technical24/25

E-E-A-T7/7

Images7/7

Links5/5

URL5/5

Social4/5

Freshness4/4

Mobile3/4

Indexability3/3

paloaltoonline.compaloaltoonline.com

Palo Alto Online - Palo Alto Online

Nonprofit local news for the Midpeninsula

Title Length35 chars

Recommended: 50-60 chars (~205px / 580px)

Description Length41 chars

Recommended: 120-160 chars

Issues (0)

5 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

63 URLs

63 sub-sitemaps

robots.txt

35 rules

Sitemap reference found

Local SEO

Local Search Readiness

26/100

Needs Work

7 10

Sponsored

AI & LLM Readiness

D47/100

Bot Access

9/25

Machine Read.

7/25

Schema Data

11/25

Citation

20/25

AI Bot Access

4/14 accessible

AI Search

OAI-SearchBot

PerplexityBot

Claude-SearchBot

Gemini-Deep-Research

DuckAssistBot

Training

GPTBot

ClaudeBot

Google-Extended

Meta-ExternalAgent

Bytespiderinfo

Amazonbot

Applebot-Extended

CCBotinfo

Fetch

ChatGPT-User

Machine Readability

llms.txt

llms-full.txt

Semantic HTML

Heading Hierarchy

Text ratio:3%

Words:2,315

Token eff.:Optimal

Structured Data

5 JSON-LD

Person×1.3Organization×1.1WebSiteBreadcrumbListSearchAction

sameAs entity links

Citation Readiness

Opening Summary188w

Descriptive Headingsavg 8.8w

Canonical URL

Open Graph3/3

Twitter Card1/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (10)

AI readiness recommendation preview...

Upgrade to view recommendations

Sponsored

Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.

77/100

Passed

Critical

Warnings

Images & Alt Text

18/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

13/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

10/15

Verifies form fields have labels, error messages are clear, and inputs are properly associated.

Color & Contrast

15/15

Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.

Keyboard & Focus

11/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

10/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

2 recommendations

•Accessibility recommendation preview...

Upgrade to view recommendations

Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.

42/100

242 mg

CO₂e / view

1.9 MB

Page Weight

50%

Cleaner Than

New Visitor

277 mg

Returning (cached)

138 mg

Annual (10K/mo)

29.1 kg

Emission Segments

Data Center

54 mg

Network

58 mg

Device

130 mg

Resource Breakdown

JavaScript

513.5 KB

Images

767.2 KB

CSS

556.5 KB

HTML

43.5 KB

Other

78.1 KB

Green Hosting Not Verified

Automattic, Inc

6 recommendations

•Carbon footprint recommendation preview...

Upgrade to view recommendations

Security Score

0%Critical

Critical / Transactional

HTTPS

No WAF

73d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

09.04.2026

Valid Until

08.07.2026

Subject Alternative Names (18)

actionacademy.usecloudforge.comacueastwest.combancroft.truenorthatlas.usbehavioralfamilysolutions.combiologos.comcainearthworksinc.comcruciallogics.comeasywebsitelaunch.com+10 more

SHA-256 Fingerprint

71:20:D9:9E:2C:70:3B:AF:4D:D6:8B:1E:EC:42:9C:6C:97:FC:0A:5D...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

alt-svc

h3=":443"; ma=86400

cache-control

🟡 103s(max-age=103, must-revalidate)

content-encoding

⚡ Brotli(br)

content-type

text/html; charset=UTF-8

date

Sat, 25 Apr 2026 21:36:20 GMT

host-header

Newspack

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (5)

alt2.aspmx.l.google.com

alt1.aspmx.l.google.com

aspmx3.google.com

aspmx2.google.com

+1 more

Domain Information

paloaltoonline.com

Domain Age

29y 8m

Created

06.08.1996

Expires

05.08.2032

Last Updated

07.09.2025

Registrar

GoDaddy.com, LLC

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Data Protection Officer mentioned

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.

82/100

Mobile Friendly21 breakpoints

Viewport Meta

The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.

Responsive Design

Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.

Touch Icons

Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.

Readable Font Size

Base font size should be at least 16px on mobile to ensure text is readable without zooming.

Relative Units

Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.

No H-Scroll Risk

No elements wider than the viewport that would cause horizontal scrolling on mobile devices.

Tap Targets OK

Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.

No Fixed Widths

No elements with fixed pixel widths that could overflow on smaller screens and break the layout.

Viewport

width=device-width, initial-scale=1

1 recommendation

•Mobile compatibility recommendation preview...

Upgrade to view recommendations

Typography & Readability

Open Sans

WCAG AA

84/100

Readability

/30

24/30

16px · LH 1.60

Hierarchy

/20

20/20

2.8x ratio · ✓ H1→H6

WCAG

/25

22/25

6.56:1 min contrast

Performance

/25

18/25

1 font · 4 req

Heading Font

Open Sans

Sans45px

Body Font

Open Sans

Sans16px

Contrast Ratio

6.56:1

WCAG AA (≥4.5:1)

Reading Comfort

~41 CPL

Narrow lines

45px

36px

24px

16px

✅ Excellent readability: 16px body text is ideal for all devices.

✅ Optimal line spacing: 1.60 ratio (ideal range 1.4–1.6).

❌ Very complex text: Flesch score 9/100. Consider shorter sentences and simpler words.

✅ WCAG AA contrast: All text meets 4.5:1 ratio (min 6.6:1).

✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

✅ Strong hierarchy: Headlines are 2.8x larger than body text.

Buy on MyFontsFluid Type (rem)Flesch 9

Color Palette

12 unique colors

10.79:1 AAA Light

#ffffff

Background· 46.1%

#433c3a

Text· 5.9%

#15151a

Primary· 10.8%

#af9e8b

Secondary· 5.7%

#665648

Secondary· 4.2%

#cec9c0

Border· 4%

#e9ebe6

Secondary· 3.3%

#68382b

Secondary· 2.6%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

googletagmanager.com(5)c0.wp.com(3)static.chartbeat.com(2)securepubads.g.doubleclick.net(2)cdn-p.cityspark.com(2)

Website Identity

Palo Alto Online

Organization

Nonprofit local news for the Midpeninsula

www.paloaltoonline.com/

29 years old

Location detected: 🇺🇸 United Statesvia ip

GoDaddy.com, LLC📧 Google Workspaceen-US

Social Profiles

Facebook X (Twitter)Instagram

Sponsored

Last analyzed: 25 Apr 2026 at 21:36

Historical Analysis & Change Tracking